The Automotive Test Solutions eSCOPE ELITE4 oscilloscope has an automatic test lead connection detection to notify the user that the scope lead has a good connection. The oscilloscope has an automatic voltage attenuater and a dual time base that allows two different frequencies to be displayed on one screen with two different scope displays simultaneously. The dual time base also allows separate triggers and/or trigger modes on each time base. A pull down circuit features a controlled pulse that sinks power from vehicle circuit to ground, control circuits like ignition coils, fuel injectors and solenoids and TTL output, which sends a 0-5v square wave signal out of scope. Turn on devices such as ignition coil drivers, test vehicle’s circuits and test vehicle’s circuits for loading.